[Freeswitch-users] Call Recording has poor sound quality

Alex Lake alex at digitalmail.com
Fri Mar 15 12:22:39 MSK 2013


Hi Yossi,
I agree it shouldn't be CPU intensive (and have nothing to suggest that 
it is!). I've been told now that the quality is acceptable, even if it 
sounds poor to me! ;-)
Maybe will try with other codecs and see.
Alex

> On 03/14/2013 08:24 AM, Alex Lake wrote:
>> Just started playing with call recording on Freeswitch
>>
>> Saving as WAV and the sound quality is really poor - very muffled and
>> possibly chunks of sound missing.
>>
>> The actual call is using PCMA 8KHz.
>> The recording is Wave PCM signed 16 bit, 8000 Hz, 256 kbps, stereo
>>
>> Any idea what's going on? Are there any CPU constraints?
> When you use the recording functions, it will always transcode out to
> slinear 16 bit to the native rate of the channel (in this case a sample
> rate of 8000).  The question that I have is this - when you select
> g711ulaw or another codec, do you end up with the same results as your
> test with g711alaw?
>
> Converting from g711alaw to slin16 should not be a CPU intensive conversion.
>
> -Yossi
>
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